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https://www.readbyqxmd.com/read/29456518/environmental-physiology-and-diving-medicine
#1
REVIEW
Gerardo Bosco, Alex Rizzato, Richard E Moon, Enrico M Camporesi
Man's experience and exploration of the underwater environment has been recorded from ancient times and today encompasses large sections of the population for sport enjoyment, recreational and commercial purpose, as well as military strategic goals. Knowledge, respect and maintenance of the underwater world is an essential development for our future and the knowledge acquired over the last few dozen years will change rapidly in the near future with plans to establish secure habitats with specific long-term goals of exploration, maintenance and survival...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29455769/prevention-of-sudden-cardiac-death-in-athletes-sportspersons-and-marathoners-in-india
#2
REVIEW
Amit Vora, Nitin Burkule, Ashish Contractor, Kartikeya Bhargava
The annual incidence of sudden cardiac death (SCD) in athletes is significantly lower than the general population. However, when SCD occurs in an athlete during sporting event or training, it sends shockwaves in the society and raises questions about cardiovascular effects of sports and exercise. This document reviews the causes and mechanism of SCD in sports and exercise in young and older athletes. In the Indian context, we suggest a 'pre-participation screening' of young and older athletes and consider a 'supervised, graded exercise regime' for the uninitiated, older sports participant...
January 2018: Indian Heart Journal
https://www.readbyqxmd.com/read/29453741/fuel-for-the-work-required-a-theoretical-framework-for-carbohydrate-periodization-and-the-glycogen-threshold-hypothesis
#3
Samuel G Impey, Mark A Hearris, Kelly M Hammond, Jonathan D Bartlett, Julien Louis, Graeme L Close, James P Morton
Deliberately training with reduced carbohydrate (CHO) availability to enhance endurance-training-induced metabolic adaptations of skeletal muscle (i.e. the 'train low, compete high' paradigm) is a hot topic within sport nutrition. Train-low studies involve periodically training (e.g., 30-50% of training sessions) with reduced CHO availability, where train-low models include twice per day training, fasted training, post-exercise CHO restriction and 'sleep low, train low'. When compared with high CHO availability, data suggest that augmented cell signalling (73% of 11 studies), gene expression (75% of 12 studies) and training-induced increases in oxidative enzyme activity/protein content (78% of 9 studies) associated with 'train low' are especially apparent when training sessions are commenced within a specific range of muscle glycogen concentrations...
February 16, 2018: Sports Medicine
https://www.readbyqxmd.com/read/29450135/development-of-a-specific-index-to-detect-malnutrition-in-athletes-validity-in-weight-class-or-intermittent-fasted-athletes
#4
François D Desgorces, Christophe Moinard, Mounir Chennaoui, Jean-François Toussaint, Cyril Petibois, Philippe Noirez
Fasted or weight-category athletes manage their training under strict diet conditions that could impair the stress-recovery balance and result in acute or chronic fatigue. However, to date, no validated biomarker are available to quantify this phenomena. The aim of this study was to assess the validity of a specific index combining plasma albumin and weight change to detect nutrition-related risks of fatigue increase and under-performance in athletes experiencing particular nutritional conditions. An athlete's nutrition risk index (ANRI) equation, based on data from lightweight and heavyweight rowers, was developed using relationship between plasma albumin concentrations combined to weight changes with sport performance and overtraining scores and was tested by odds ratio for failure...
June 2017: Biochimie open
https://www.readbyqxmd.com/read/29444266/fundamentals-of-glycogen-metabolism-for-coaches-and-athletes
#5
Bob Murray, Christine Rosenbloom
The ability of athletes to train day after day depends in large part on adequate restoration of muscle glycogen stores, a process that requires the consumption of sufficient dietary carbohydrates and ample time. Providing effective guidance to athletes and others wishing to enhance training adaptations and improve performance requires an understanding of the normal variations in muscle glycogen content in response to training and diet; the time required for adequate restoration of glycogen stores; the influence of the amount, type, and timing of carbohydrate intake on glycogen resynthesis; and the impact of other nutrients on glycogenesis...
February 10, 2018: Nutrition Reviews
https://www.readbyqxmd.com/read/29442612/a-review-of-a-decade-of-rugby-union-injury-epidemiology-2007-2017
#6
Pierre L Viviers, Jeandré T Viljoen, Wayne Derman
CONTEXT: Rugby union is the most widely played team collision sport globally. As with other contact sports, there is substantial risk of injury. To date, the majority of studies on injury epidemiology have focused on elite male cohorts, which inherently prevents extrapolation of research findings to other groups within the player continuum. This review aims to describe emerging injury trends across the spectrum of various rugby union subpopulations and to highlight gaps that may influence future injury prevention tactics...
February 1, 2018: Sports Health
https://www.readbyqxmd.com/read/29438911/biomechanical-assessment-of-dynamic-balance-specificity-of-different-balance-tests
#7
Steffen Ringhof, Thorsten Stein
Dynamic balance is vitally important for most sports and activities of daily living, so the assessment of dynamic stability has become an important issue. In consequence, a large number of balance tests have been developed. However, it is not yet known whether these tests (i) measure the same construct and (ii) can differentiate between athletes with different balance expertise. We therefore studied three common dynamic balance tests: one-leg jump landings, Posturomed perturbations and simulated forward falls...
February 10, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29436120/intermittent-exercise-and-insulin-sensitivity-in-older-individuals-it-s-a-hiit
#8
EDITORIAL
Martin J Gibala
The paper by Søgaard et al.1 in this issue of Acta Physiologica sheds new light on the potential for high-intensity interval training (HIIT) to improve insulin sensitivity and other indices of cardiometabolic health in older individuals. While interval training has been practiced by high-level athletes for more than a century, the last decade in particular has seen a resurgence of interest in the method as a means to enhance health in a wide range of individuals. Renewed scientific inquiry has been accompanied by increased attention from fitness enthusiasts, as evidenced by the fact that HIIT was again recently named the top fitness trend worldwide in an annual survey by the American College of Sports Medicine...
February 12, 2018: Acta Physiologica
https://www.readbyqxmd.com/read/29435749/skills-in-minimally-invasive-and-open-surgery-show-limited-transferability-to-robotic-surgery-results-from-a-prospective-study
#9
Karl-Friedrich Kowalewski, Mona W Schmidt, Tanja Proctor, Moritz Pohl, Erica Wennberg, Emir Karadza, Philipp Romero, Hannes G Kenngott, Beat P Müller-Stich, Felix Nickel
BACKGROUND: There is limited evidence on the transferability of conventional laparoscopic and open surgical skills to robotic-assisted surgery. The primary aim of this study was to evaluate the transferability of expertise in conventional laparoscopy and open surgery to robotic-assisted surgery using the da Vinci Skills Simulator (dVSS). Secondary aims included evaluating the influence of individual participants' characteristics. METHODS: Participants performed four tasks on the dVSS: Peg Board 1 (PB), Pick and Place (PP), Thread the Rings (TR), and Suture Sponge 1 (SS)...
February 12, 2018: Surgical Endoscopy
https://www.readbyqxmd.com/read/29434077/low-proportion-of-dietary-plant-protein-among-athletes-with-premenstrual-syndrome-related-performance-impairment
#10
Keiko Yamada, Takashi Takeda
Premenstrual syndrome (PMS) is psychosomatic disorder that are limited to the late luteal phase in the menstrual cycle. PMS could impair athletic performance. To investigate associations between proportions of dietary plant and animal protein and PMS-related impairment of athletic performance, we surveyed 135 female athletes aged 18-23 years attending Kindai University. Participants belonged to authorized university clubs, all of which have high rankings in Japanese university sports. Participants completed self-administered questionnaires on diet history, demographics, and PMS-related impairment of athletic performance...
2018: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29433921/modified-perceptual-training-in-sport-a-new-classification-framework
#11
REVIEW
Stephen Mark Hadlow, Derek Panchuk, David Lindsay Mann, Marc Ronald Portus, Bruce Abernethy
OBJECTIVES: To overview a framework that provides a theoretically-grounded approach to predicting the types of modified perceptual training tasks that will stimulate transfer of improved perceptual skills to sport performance environments. Modified perceptual training (MPT) collectively describes on- or off-field sports training tasks that are specifically designed to develop visual and perceptual-cognitive skill. Traditional training approaches in sport include sports vision training and perceptual-cognitive training, while recently, new technologies have enabled a broad range of additional MPT tools to become available to coaches and athletes...
February 3, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29431592/in-season-changes-in-ventricular-morphology-and-systolic-function-in-adolescent-female-athletes
#12
Andrew M Watson, Carol Coutinho, Kristin Haraldsdottir, Stacey Brickson, Warren Dunn, Marlowe Eldridge
PURPOSE: To evaluate the influence of physical maturity on the changes in ventricular morphology and function with sport training in female youth athletes. METHODS: Thirty-two female athletes (age 13-18 years) underwent height and weight measurement and 2-D echocardiographic evaluation immediately prior to, and following, a 20-week soccer season. Pre- and post-season left ventricular end-diastolic diameter (LVEDD), end-diastolic volume (LVEDV), ejection fraction (LVEF), stroke volume (LVSV), mass (LVM), and posterior wall thickness (LVPWT), right ventricular end-diastolic diameter (RVEDD), end-diastolic area (RVEDA), and fractional area change (RVFAC), and interventricular septal thickness (IVST) were compared...
February 12, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29431556/the-fit-matters-influence-of-accelerometer-fitting-and-training-drill-demands-on-load-measures-in-rugby-league-players
#13
Blake D McLean, Cloe Cummins, Greta Conlan, Grant Duthie, Aaron J Coutts
PURPOSE: Determine the relationship between drill type and accelerometer-derived loads during various team sport activities, and examine the influence of unit fitting on these loads. METHODS: Sixteen rugby league players were fitted with microtechnology devices in either manufacturer vests or playing jerseys before completing standardised running, agility and tackling drills. Two-dimensional (2D) and three-dimensional (3D) accelerometer loads (BodyLoadTM) per km were compared across drills and fittings (i...
February 12, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29431534/organisation-of-dietary-control-for-nutrition-training-intervention-involving-periodized-carbohydrate-cho-availability-and-ketogenic-low-cho-high-fat-lchf-diet
#14
Joanne G Mirtschin, Sara F Forbes, Louise E Cato, Ida A Heikura, Nicki Strobel, Rebecca Hall, Louise M Burke
We describe the implementation of a 3-week dietary intervention in elite race walkers at the Australian Institute of Sport, with a focus on the resources and strategies needed to accomplish a complex study of this scale. Interventions involved: traditional guidelines of high carbohydrate (CHO) availability for all training sessions (HCHO); a periodized CHO diet which integrated sessions with low CHO and high CHO availability within the same total CHO intake, and a ketogenic low-CHO high-fat diet (LCHF). 7-day menus and recipes were constructed for a communal eating setting to meet nutritional goals as well as individualized food preferences and special needs...
February 12, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29429397/pre-movement-and-during-movement-visual-search-behaviours-vary-depending-on-expertise-and-anxiety-levels-in-ten-pin-bowling
#15
Wan Xiu Goh, Bernice H Y Lim, Matthew James Wylde, Michele Macnaughton, Jia Yi Chow, Marcus J C Lee
This study investigated the pre-movement and during-movement visual search behaviour (VSB) and quiet eye (QE) of 11 elite versus 10 sub-elite ten-pin bowlers, performing under high-anxiety and low-anxiety conditions. Pre-movement and independent of expertise, bowlers had more fixations and directed them to more locations when performing under high-anxiety compared with low-anxiety. Elite bowlers fixated at more locations closer to the pins in pre-movement than during-movement, with pre-movement QE occurring mostly at the breakpoint and middle arrows...
February 10, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29425972/a-longitudinal-analysis-of-salivary-testosterone-concentrations-and-competitiveness-in-elite-and-non-elite-women-athletes
#16
Blair T Crewther, Christian J Cook
BACKGROUND: There is evidence linking women's T to competitive behaviours in sport and exercise. To advance this work, we examined the longitudinal relationships between salivary testosterone (sal-T) and competitiveness in athletic women who differ in training status. METHODS: Elite (n = 9) and non-elite (n = 21) women athletes were monitored on days 6-8 (follicular phase), 13-15 (ovulatory phase) and 20-22 (Luteal phase) of a menstrual cycle with two repeats...
February 6, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29424273/neuromuscular-physiology-exercise-and-training-during-youth-the-year-that-was-2017
#17
David G Behm
The pressure for children to excel and succeed in sport continues to mount. Although resistance training for youth was in disfavor by many organizations even into the early 21st century, children's training programs are more closely resembling the volume and intensity of adult programs. The physiological maturation of adolescent youth may impact their response to advanced training programs. Furthermore, the pressure to specialize in specific sports rather than engage in a variety of sporting activities may affect not only training responses but also injury incidence...
February 9, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29422839/exercise-induced-fatigue-impairs-bidirectional-corticostriatal-synaptic-plasticity
#18
Jing Ma, Huimin Chen, Xiaoli Liu, Lingtao Zhang, Decai Qiao
Exercise-induced fatigue (EF) is a ubiquitous phenomenon in sports competition and training. It can impair athletes' motor skill execution and cognition. Corticostriatal synaptic plasticity is considered to be the cellular mechanism of movement control and motor learning. However, the effect of EF on corticostriatal synaptic plasticity remains elusive. In the present study, using field excitatory postsynaptic potential recording, we found that the corticostriatal long-term potentiation (LTP) and long-term depression (LTD) were both impaired in EF mice...
2018: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29420813/sport-psychology-for-the-soldier-athlete-a-paradigm-shift
#19
Vanessa M Meyer
Background: Competitive athletes train body and mind in preparation for competition with mental fortitude often providing the "winning edge." Similarly, the current-day warfighter faces significant physical and psychological challenges and must be prepared to respond to life-threatening danger with mental and physical agility. Sport Psychology for the Soldier Athlete recognizes the soldier as an elite athlete and provides training required to perform at the highest caliber. Through this curriculum, mental skills coaching in goal setting, imagery, positive self-talk, and heart rate control is integrated into routine physical fitness training...
February 6, 2018: Military Medicine
https://www.readbyqxmd.com/read/29420793/injuries-sustained-during-modern-army-combatives-tournaments
#20
Jonathan I Stuart, Ian L Hudson, Simon A Sarkisian, Michael P Simpson, Benjamin P Donham
Introduction: Injuries sustained during Modern Army Combatives (MAC) tournaments can result in variable recovery time for involved competitors and unpredictable loss of readiness for military units. A paucity of MAC data is available to guide military medical providers and unit commanders on expected injuries or loss of readiness. Literature reviewing mixed martial arts competitions offers some insight but demonstrates variation in fight outcomes resulting in injuries ranging from 8.5% to 70% and it is difficult to effectively extrapolate such data to predict MAC tournament injuries...
February 6, 2018: Military Medicine
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